add readme, assets, and data!

src/main/resources/data/templates/advancements/recipes/decorations/slope.json

@@ -0,0 +1,32 @@
+{
+  "parent": "minecraft:recipes/root",
+  "rewards": {
+    "recipes": [
+      "minecraft:scaffolding"
+    ]
+  },
+  "criteria": {
+    "has_bamboo": {
+      "trigger": "minecraft:inventory_changed",
+      "conditions": {
+        "items": [
+          {
+            "item": "minecraft:bamboo"
+          }
+        ]
+      }
+    },
+    "has_the_recipe": {
+      "trigger": "minecraft:recipe_unlocked",
+      "conditions": {
+        "recipe": "templates:slope"
+      }
+    }
+  },
+  "requirements": [
+    [
+      "has_bamboo",
+      "has_the_recipe"
+    ]
+  ]
+}

src/main/resources/data/templates/recipes/slope.json

@@ -0,0 +1,20 @@
+{
+  "type": "minecraft:crafting_shaped",
+  "pattern": [
+    "I  ",
+    "I~ ",
+    "III"
+  ],
+  "key": {
+    "I": {
+      "item": "minecraft:bamboo"
+    },
+    "~": {
+      "item": "minecraft:string"
+    }
+  },
+  "result": {
+    "item": "templates:slope",
+    "count": 4
+  }
+}